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Tungsten Filament
An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated until it glows. The filament is enclosed in a glass bulb with a vacuum or inert gas to protect the filament from oxidation. Current is supplied to the filament by terminals or wires embedded in the glass. A bulb socket provides mechanical support and electrical connections. Incandescent bulbs are manufactured in a wide range of sizes, light output, and voltage ratings, from 1.5 volts to about 300 volts. They require no external regulating equipment, have low manufacturing costs, and work equally well on either alternating current or direct current. As a result, the incandescent bulb became widely used in household and commercial lighting, for portable lighting such as table lamps, car headlamps, and flashlights, and for decorative and advertising lighting. Incandescent bulbs are much less efficient than other types of electric lighting, converting less ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vincenzo Balzani Vincenzo Balzani (born 15 November 1936 in Forlimpopoli, Italy) is an Italian chemist, now emeritus professor at the University of Bologna. Career He has spent most of his professional life at the “Giacomo Ciamician” Department of Chemistry of the University of Bologna, becoming full professor in 1973. He has been appointed emeritus professor on November 1, 2010. Teaching activity He taught courses on General and Inorganic Chemistry, Photochemistry, Supramolecular chemistry. He was chairman of the PhD course on Chemical Sciences from 2002 to 2007 and of the “laurea specialistica” in Photochemistry and Material Chemistry from 2004 to 2007. In the Academic Year 2008-2009 he fo |
